enha: allow custom env when local (#1602)

config/stratus-follower.env.local

@@ -0,0 +1,10 @@
+RUST_LOG=info,stratus::eth::rpc::rpc_subscriptions::rx=off,stratus::eth::consensus::rx=off,stratus::eth::consensus=off,jsonrpsee-server=debug
+
+CHAIN_ID=2008
+EVMS=1
+
+PERM_STORAGE=inmemory
+TEMP_STORAGE=inmemory
+
+EXTERNAL_RPC=http://spec.testnet.cloudwalk.network:9934/
+EXTERNAL_RPC_WS=ws://spec.testnet.cloudwalk.network:9946/

justfile

@@ -8,8 +8,6 @@ export RUST_BACKTRACE := env("RUST_BACKTRACE", "0")
 nightly_flag := if env("NIGHTLY", "") =~ "(true|1)" { "+nightly" } else { "" }
 release_flag := if env("RELEASE", "") =~ "(true|1)" { "--release" } else { "" }
 database_url := env("DATABASE_URL", "postgres://postgres:[email protected]:5432/stratus")
-external_rpc := "http://spec.testnet.cloudwalk.network:9934/"
-external_rpc_ws := "ws://spec.testnet.cloudwalk.network:9946/"
 
 # Project: Show available tasks
 default:
@@ -92,8 +90,8 @@ stratus *args="":
     cargo {{nightly_flag}} run --bin stratus {{release_flag}} --features dev -- --leader {{args}}
 
 # Bin: Stratus main service as follower
-stratus-follower external_rpc=external_rpc external_rpc_ws=external_rpc_ws *args="":
-    cargo {{nightly_flag}} run --bin stratus {{release_flag}} --features dev -- --follower --external-rpc {{external_rpc}} --external-rpc-ws {{external_rpc_ws}} {{args}}
+stratus-follower *args="":
+    LOCAL_ENV_PATH=stratus-follower cargo {{nightly_flag}} run --bin stratus {{release_flag}} --features dev -- --follower {{args}}
 
 # Bin: Download external RPC blocks and receipts to temporary storage
 rpc-downloader *args="":

src/config.rs

@@ -35,16 +35,23 @@ pub fn load_dotenv_file() {
         Ok(env) => Environment::from_str(env.as_str()),
         Err(_) => Ok(Environment::Local),
     };
-    let env = match env {
-        Ok(env) => env,
+
+    // determine the .env file to load
+    let env_filename = match env {
+        Ok(Environment::Local) => {
+            // local environment only
+            match std::env::var("LOCAL_ENV_PATH") {
+                Ok(local_path) => format!("config/{}.env.local", local_path),
+                Err(_) => format!("config/{}.env.local", build_info::binary_name()),
+            }
+        }
+        Ok(env) => format!("config/{}.env.{}", build_info::binary_name(), env),
         Err(e) => {
             println!("{e}");
             return;
         }
     };
 
-    // load .env file
-    let env_filename = format!("config/{}.env.{}", build_info::binary_name(), env);
     println!("reading env file | filename={}", env_filename);
 
     if let Err(e) = dotenvy::from_filename(env_filename) {